Electric switch



Dec. 14 1926. 1,610,789

J. M. JENSEN ELECTRIC SWITCH Filed Feb. 2. 1925 Inventor Jens D'Ldensen HLS Attorne y Patented Dec. 14, 1926.

UNITED STATES PATENT OFFICE.

JENS M. JENSEN, OF SGHENECTADY, NEW YORK, TO GENERAL ELECTRIC COMPANY, A CORPOBATTGN OF NEW" 'YQPLK.

ELECTRIC SWITCH.

Application filed February 2, 1925. lei:

My invention relates to electric switches of the fluid break type in which the fluid is contained in a tank which may be lowered away from the switch proper in object of my invention is to provide on improved portable device which may he brought up to a switch this character and operated to raise or lower the tank thereof.

My invention will be better understood from the :t'ollov-ringdescription taken in connection with the accompanying drawing and its scope will be pointed out in the ap pended claims.

Figs. 1. 2 and 3 respectively are a side elevation, av rear elevation and a plan view of a device illustrating my invention.

In the drawing there is shown by dot and dash lines a portion of the cover portion 1. and tank 2 of a fluid break switch. Stand- 20 ing on the floor 3 beside the switch is the portable tan: lifting device coniipri ing my invention. This device forms no part of the switch proper but is adapted to be applied to any one of a number of switches 25 when it is desired to raise or lower the tank of any switch. As illustrated the frame of the device con'iprises two parallel sections of pipe 5 which at the lower ends are secured together by the cross member 6 carryingtwo screw studs 7. These studs are adapted to in suitable r cesses in the floor 8, the recesses beingpreferably lined with sleeves 8 and on each stud is a nut 9 which rests on the floor. A limited vertical adjustment of the frame is thus obtainal'ne. At their upper ends the two pipes are ioined together by the connecting member 10 being secured to the pipes by yokes 11 and providing bearings for the driven shaft 1:?! and the crank shaft 13. An extension 15 of this member 10 is constructed to hook over the cover portion 1 of the switch and. pivoted to this portion is the clamping); member 16 which when operated by (the screw 17 securely 45 clamps the upper end of the lifting device to the switch. At the lower portion of the frame is the socket member 20 which is so constructed that it fits the curvature of the tank and has a recess adapted to receive the bottom edge thereof. The socket member 90 carries two rollers 21 having; their faces curved to lit the respective pipes 5 which thus form guides and also has a pair of retaining fingers 2-2 to prevent separation of the socket member from these guides.

The socket 20 is supported by two rods 24: connected at their upper ends by the cross head 25. The bifurcated lug 26 standing}; upwardly from this cross head has pivoted thereto the cross bar 27 the ends of which are turned at 'rg'ht angles and each attached to the end of the chain 28. The chains 28 pass up over sprockets 29 mounted on shaft 12 and are retained aganist accidental dis placement therefrom by guides 80. Centrally on the shaft 12 is secured the rm wheel 32 with which meshes the worm 33 on the crank shaft 18. The worm is rotated by a hand crank 35. An auxiliary support for the tank is provided by a finger which is pivoted to the cross head 25 and which engages the usual handle 37 on the tank. A certain amount of adjustaliiility of this finger is provided by the adjusting screw 38 carried by the cross head 25 and engaging the lug 39 on the finger. The cross head 25 also carries two rollers 40 which. engage the frame pipes 5 on the side opposite the rollers 21 sincethe pressure exerted by the tank is in the opposite direction.

.lt will thus be seen that the device is of such a nature that it may be readily applied to a switch and by rotating the crank the tank may be lowered and raised as desired, in which movements the frame itself serves as a guide. After the device is no longer needed it may be unclamped from the switch and bodily removed.

Vhile I have described only one embodiment of my invention. do not wish to be limited to the particular form shown and described as it will be apparent that many modifications therein may be made without departing from the scope of my invention forth in the appended claims.

lVhat I claim as new and desire to secure by Letters Patent of the Unit d States is l. A portable tank lifting device for fluid break switches com an upright frame, means for clampiig the frame to a fixed part of the switch a member having a portion adapted to engage the bottom of said tank and having another portion guided by J a d means for raising and low- :ember. able tank lifting device for fluid 'es (OilzDllSlIlQ an upright frame, clamping means for securing the upper portion of the frame to the switch a tank supframe, an auxiliary supporting member also guided by the frame and engaging the upper portion of the tank and means carried? by the frame for raising and lowering said supporting members.

3. A portable tank lifting device for fluid break switches, comprising a frame including upright guide members, a clamp carried by the upper portion of the frame adapted to engage the tent; covering portion of a switch, a supporting member adapted to engage the bottom of the switch tank, an. auxiliary supporting member adapted to engage a handle on the tanl'gsaid supporting members being arranged to be guided, by the guide membersot' said frame,

and ar hoisting gearcarried by the frame for gaising and lowering said. supporting memers. I

4. A portable tank lifting device for fluid break switches comprising a frame formed in part of a pair of upright tubular guide 'nbers, means for anchoring the bottom '1 the frame to t-he'fl oor and for adjusting the height of the frame above the floor, a clamp adapted to secure the upper part of the frame to the tank covering portion of a switch a socket member adapted to recei'i a portion of the bottom of the switch taninan auxiliary supporting member adapted to engage a handle on the switch ta said! supporting members haying r011 ers tor engaging opposite'sides of said guide 211 311113613; and a hoisting. gear for said: supports carried by said frame comprising. a chain a sprocket Wheel and: Worm gearing for driving the sprocket wheeh in. Witness whereof, I. have; hereunto set my hand this 31st day ofJanuary, 1925.

Jens M. JENSEN. 

